Customizing the files view has been announced and is coming soon! This will include viewing metadata from document libraries and lists.
Here is the link to the blog post that details the features that are coming: https://techcommunity.microsoft.com/t5/microsoft-sharepoint-blog/rich-new-file-and-sharing-experiences-throughout-microsoft-365/ba-p/960129
An error occurred while saving the commentGavin Haak commented
The ability to edit metadata should be viewed as a priority. Many enterprises want to use Teams as their front door for document management - having to go between Teams and SPO experiences for a fully functional DMS is not a great experience.
Due to other priorities, this has been moved to the backlog. We will update you as we evaluate in the future.